High cadmium uptake ability of Bacillus cereus strains isolated from rhizosphere of Tagetes minuta L. growing in cadmium-polluted soil

  • Kulsoom Akhter Department of Chemistry, University of Azad Jammu and Kashmir, Muzaffarabad 13100
  • Tahseen Ghous Department of Chemistry, Mirpur University of Science and Technology, Mirpur
  • Muhammad Siddique Awan Department of Zoology, University of Azad Jammu and Kashmir, Muzaffarabad-13100
  • Zain Ul-Abdin Department of Chemistry, University of Azad Jammu and Kashmir, Muzaffarabad 13100
  • Basharat Hussain Department of Chemistry, University of Azad Jammu and Kashmir, Muzaffarabad 13100
Keywords: Bioaccumulation, Rhizosphere, B. CereusAVP12, B. Cereus NC7401

Abstract

Microbes resistant to heavy metals develop mechanisms to accumulate Cd(II) in their cells. Two bacterial strains, Bacillus cereus AVP12 and B. cereus NC7401 which grew at high Cd(II) concentration were isolated from roots of Tagetes minuta L. growing in Cd(II) contaminated and uncontaminated soil. Minimum inhibitory concentration (MIC) and percent removal capacity were determined as function of pH, contact time and initial Cd(II) concentration. Bioaccumulation capacity was determined to observe possible effect of two different rhizospheres on Cd(II) removal capacity of both strains. Both strains were resistant up to 300 mg/l Cd(II) concentration. The percent removal capacity of both strains was maximum at pH 7 and incubation time of 24 hrs. High bioaccumulation capacity was observed with increasing Cd(II) concentration. Both Langmuir and Freundlich models fitted well to data of Cd(II) bioaccumulation. Though, maximum adsorption capacity (Qo) was observed for strains isolated from both types of rhizospheres, however remarkable Qo values of 434.0 and 212.7 mg/g were observed for Bacillus cereus AVP12 and NC7401, respectively isolated from polluted rhizosphere. Bacillus cereus strains growing in polluted rhizosphere can develop high Cd(II) uptake ability in comparison to non-polluted rhizosphere.

Downloads

Download data is not yet available.
Abstract
328
PDF
266
Published
2018-10-28
How to Cite
Akhter, K., Ghous, T., Awan, M., Ul-Abdin, Z., & Hussain, B. (2018). High cadmium uptake ability of Bacillus cereus strains isolated from rhizosphere of Tagetes minuta L. growing in cadmium-polluted soil. Bangladesh Journal of Botany, 47(3), 515-522. https://doi.org/10.3329/bjb.v47i3.38720
Section
Articles